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Note 5 - Intangible Assets, Net | 9 Months Ended
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Mar. 31, 2025
Notes to Financial Statements |
Intangible Assets Disclosure [Text Block] | (5) Intangible Assets, net As of March 31, 2025, and June 30, 2024, intangible assets, net consisted of the following, respectively:
(In thousands) |  | March 31, 2025 |  |  | June 30, 2024 |
Indefinite-life intangible asset |  | $ | 50 |  |  | $ | — |
Accumulated amortization |  |  | — |  |  |  | — |
Intangible Assets, net |  | $ | 50 |  |  | $ | — |
The indefinite-life intangible asset consists of a license from a national laboratory for technology used in gas chromatographic products.

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